// jquery.tweet.js - See http://tweet.seaofclouds.com/ or https://github.com/seaofclouds/tweet for more info
// Copyright (c) 2008-2012 Todd Matthews & Steve Purcell
// Modified by Stan Scates for https://github.com/StanScates/Tweet.js-Mod

(function (factory) {
    if (typeof define === 'function' && define.amd)
    define(['jquery'], factory); // AMD support for RequireJS etc.
    else
    factory(jQuery);
}(function ($) {
    $.fn.tweet = function(o){
        var s = $.extend({
            modpath: "/twitter/",                     // [string] relative URL to Tweet.js mod (see https://github.com/StanScates/Tweet.js-Mod)
            username: "",                             // [string or array] required unless using the 'query' option; one or more twitter screen names (use 'list' option for multiple names, where possible)
            list: null,                               // [string]   optional name of list belonging to username
            favorites: false,                         // [boolean]  display the user's favorites instead of his tweets
            query: null,                              // [string]   optional search query (see also: http://search.twitter.com/operators)
            avatar_size: null,                        // [integer]  height and width of avatar if displayed (48px max)
            count: 3,                                 // [integer]  how many tweets to display?
            fetch: null,                              // [integer]  how many tweets to fetch via the API (set this higher than 'count' if using the 'filter' option)
            page: 1,                                  // [integer]  which page of results to fetch (if count != fetch, you'll get unexpected results)
            retweets: true,                           // [boolean]  whether to fetch (official) retweets (not supported in all display modes)
            intro_text: null,                         // [string]   do you want text BEFORE your your tweets?
            outro_text: null,                         // [string]   do you want text AFTER your tweets?
            join_text:  null,                         // [string]   optional text in between date and tweet, try setting to "auto"
            auto_join_text_default: "i said,",        // [string]   auto text for non verb: "i said" bullocks
            auto_join_text_ed: "i",                   // [string]   auto text for past tense: "i" surfed
            auto_join_text_ing: "i am",               // [string]   auto tense for present tense: "i was" surfing
            auto_join_text_reply: "i replied to",     // [string]   auto tense for replies: "i replied to" @someone "with"
            auto_join_text_url: "i was looking at",   // [string]   auto tense for urls: "i was looking at" http:...
            loading_text: null,                       // [string]   optional loading text, displayed while tweets load
            refresh_interval: null ,                  // [integer]  optional number of seconds after which to reload tweets
            /* TODO: incorporate API support for these options server-side. */
            twitter_url: "twitter.com",               // [string]   custom twitter url, if any (apigee, etc.)
            twitter_api_url: "api.twitter.com",       // [string]   custom twitter api url, if any (apigee, etc.)
            twitter_search_url: "search.twitter.com", // [string]   custom twitter search url, if any (apigee, etc.)
            template: "{avatar}{time}{join}{text}",   // [string or function] template used to construct each tweet <li> - see code for available vars
            comparator: function(tweet1, tweet2) {    // [function] comparator used to sort tweets (see Array.sort)
                return tweet2["tweet_time"] - tweet1["tweet_time"];
            },
            filter: function(tweet) {                 // [function] whether or not to include a particular tweet (be sure to also set 'fetch')
                        return true;
                    }
        // You can attach callbacks to the following events using jQuery's standard .bind() mechanism:
        //   "loaded" -- triggered when tweets have been fetched and rendered
        }, o);

        // See http://daringfireball.net/2010/07/improved_regex_for_matching_urls
        var url_regexp = /\b((?:[a-z][\w-]+:(?:\/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}\/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:'".,<>?«»“”‘’]))/gi;

        // Expand values inside simple string templates with {placeholders}
        function t(template, info) {
            if (typeof template === "string") {
                var result = template;
                for(var key in info) {
                    var val = info[key];
                    result = result.replace(new RegExp('{'+key+'}','g'), val === null ? '' : val);
                }
                return result;
            } else return template(info);
        }
        // Export the t function for use when passing a function as the 'template' option
        $.extend({tweet: {t: t}});

        function replacer (regex, replacement) {
            return function() {
                var returning = [];
                this.each(function() {
                    returning.push(this.replace(regex, replacement));
                });
                return $(returning);
            };
        }

        function escapeHTML(s) {
            return s.replace(/</g,"&lt;").replace(/>/g,"^&gt;");
        }

        $.fn.extend({
            linkUser: replacer(/(^|[\W])@(\w+)/gi, "$1<span class=\"at\">@</span><a href=\"http://"+s.twitter_url+"/$2\">$2</a>"),
            // Support various latin1 (\u00**) and arabic (\u06**) alphanumeric chars
            linkHash: replacer(/(?:^| )[\#]+([\w\u00c0-\u00d6\u00d8-\u00f6\u00f8-\u00ff\u0600-\u06ff]+)/gi,
                ' <a href="http://'+s.twitter_search_url+'/search?q=&tag=$1&lang=all'+((s.username && s.username.length == 1 && !s.list) ? '&from='+s.username.join("%2BOR%2B") : '')+'" class="tweet_hashtag">#$1</a>'),
            makeHeart: replacer(/(&lt;)+[3]/gi, "<tt class='heart'>&#x2665;</tt>")
        });

        function linkURLs(text, entities) {
            return text.replace(url_regexp, function(match) {
                var url = (/^[a-z]+:/i).test(match) ? match : "http://"+match;
                var text = match;
                for(var i = 0; i < entities.length; ++i) {
                    var entity = entities[i];
                    if (entity.url == url && entity.expanded_url) {
                        url = entity.expanded_url;
                        text = entity.display_url;
                        break;
                    }
                }
                return "<a href=\""+escapeHTML(url)+"\">"+escapeHTML(text)+"</a>";
            });
        }

        function parse_date(date_str) {
            // The non-search twitter APIs return inconsistently-formatted dates, which Date.parse
            // cannot handle in IE. We therefore perform the following transformation:
            // "Wed Apr 29 08:53:31 +0000 2009" => "Wed, Apr 29 2009 08:53:31 +0000"
            return Date.parse(date_str.replace(/^([a-z]{3})( [a-z]{3} \d\d?)(.*)( \d{4})$/i, '$1,$2$4$3'));
        }

        function relative_time(date) {
            var relative_to = (arguments.length > 1) ? arguments[1] : new Date();
            var delta = parseInt((relative_to.getTime() - date) / 1000, 10);
            var r = '';
            if (delta < 1) {
                r = 'just now';
            } else if (delta < 60) {
                r = delta + ' seconds ago';
            } else if(delta < 120) {
                r = 'about a minute ago';
            } else if(delta < (45*60)) {
                r = 'about ' + (parseInt(delta / 60, 10)).toString() + ' minutes ago';
            } else if(delta < (2*60*60)) {
                r = 'about an hour ago';
            } else if(delta < (24*60*60)) {
                r = 'about ' + (parseInt(delta / 3600, 10)).toString() + ' hours ago';
            } else if(delta < (48*60*60)) {
                r = 'about a day ago';
            } else {
                r = 'about ' + (parseInt(delta / 86400, 10)).toString() + ' days ago';
            }
            return r;
        }

        function build_auto_join_text(text) {
            if (text.match(/^(@([A-Za-z0-9-_]+)) .*/i)) {
                return s.auto_join_text_reply;
            } else if (text.match(url_regexp)) {
                return s.auto_join_text_url;
            } else if (text.match(/^((\w+ed)|just) .*/im)) {
                return s.auto_join_text_ed;
            } else if (text.match(/^(\w*ing) .*/i)) {
                return s.auto_join_text_ing;
            } else {
                return s.auto_join_text_default;
            }
        }

        function build_api_request() {
            var modpath = s.modpath,
                count = (s.fetch === null) ? s.count : s.fetch;
            if (s.list) {
                return {
                    url: "/1.1/lists/list.json",
                        parameters: {
                            page : s.page,
                            count : count,
                            include_entities : 1
                        }
                };
            } else if (s.favorites) {
                return {
                    url: "/1.1/favorites/list.json",
                        parameters: {
                            page : s.page,
                            count : count,
                            include_entities : 1
                        }
                };
            } else if (s.query === null && s.username.length === 1) {
                return {
                    url: "/1.1/statuses/user_timeline.json",
                        parameters: {
                            page : s.page,
                            count : count,
                            include_rts : (s.retweets ? 1 : 0),
                            include_entities : 1
                        }
                };
            } else {
                var query = (s.query || 'from:'+s.username.join(' OR from:'));
                return {
                    url: "/1.1/search/tweets.json",
                        parameters: {
                            q : encodeURIComponent(query),
                            count : count,
                            include_entities : 	1
                        }
                };
            }
        }

        function extract_avatar_url(item, secure) {
            if (secure) {
                return ('user' in item) ?
                    item.user.profile_image_url_https :
                    extract_avatar_url(item, false).
                    replace(/^http:\/\/[a-z0-9]{1,3}\.twimg\.com\//, "https://s3.amazonaws.com/twitter_production/");
            } else {
                return item.profile_image_url || item.user.profile_image_url;
            }
        }

        // Convert twitter API objects into data available for
        // constructing each tweet <li> using a template
        function extract_template_data(item){
            var o = {};
            o.item = item;
            o.source = item.source;
            o.screen_name = item.from_user || item.user.screen_name;
            o.avatar_size = s.avatar_size;
            o.avatar_url = extract_avatar_url(item, (document.location.protocol === 'https:'));
            o.retweet = typeof(item.retweeted_status) != 'undefined';
            o.tweet_time = parse_date(item.created_at);
            o.join_text = s.join_text == "auto" ? build_auto_join_text(item.text) : s.join_text;
            o.tweet_id = item.id_str;
            o.twitter_base = "http://"+s.twitter_url+"/";
            o.user_url = o.twitter_base+o.screen_name;
            o.tweet_url = o.user_url+"/status/"+o.tweet_id;
            o.reply_url = o.twitter_base+"intent/tweet?in_reply_to="+o.tweet_id;
            o.retweet_url = o.twitter_base+"intent/retweet?tweet_id="+o.tweet_id;
            o.favorite_url = o.twitter_base+"intent/favorite?tweet_id="+o.tweet_id;
            o.retweeted_screen_name = o.retweet && item.retweeted_status.user.screen_name;
            o.tweet_relative_time = relative_time(o.tweet_time);
            o.entities = item.entities ? (item.entities.urls || []).concat(item.entities.media || []) : [];
            o.tweet_raw_text = o.retweet ? ('RT @'+o.retweeted_screen_name+' '+item.retweeted_status.text) : item.text; // avoid '...' in long retweets
            o.tweet_text = $([linkURLs(o.tweet_raw_text, o.entities)]).linkUser().linkHash()[0];
            o.tweet_text_fancy = $([o.tweet_text]).makeHeart()[0];

            // Default spans, and pre-formatted blocks for common layouts
            o.user = t('<a class="tweet_user" href="{user_url}">{screen_name}</a>', o);
            o.join = s.join_text ? t(' <span class="tweet_join">{join_text}</span> ', o) : ' ';
            o.avatar = o.avatar_size ?
                t('<a class="tweet_avatar" href="{user_url}"><img src="{avatar_url}" height="{avatar_size}" width="{avatar_size}" alt="{screen_name}\'s avatar" title="{screen_name}\'s avatar" border="0"/></a>', o) : '';
            o.time = t('<span class="tweet_time"><a href="{tweet_url}" title="view tweet on twitter">{tweet_relative_time}</a></span>', o);
            o.text = t('<span class="tweet_text">{tweet_text_fancy}</span>', o);
            o.reply_action = t('<a class="tweet_action tweet_reply" href="{reply_url}">reply</a>', o);
            o.retweet_action = t('<a class="tweet_action tweet_retweet" href="{retweet_url}">retweet</a>', o);
            o.favorite_action = t('<a class="tweet_action tweet_favorite" href="{favorite_url}">favorite</a>', o);
            return o;
        }

        return this.each(function(i, widget){
            var list = $('<ul class="tweet_list">');
            var intro = '<p class="tweet_intro">'+s.intro_text+'</p>';
            var outro = '<p class="tweet_outro">'+s.outro_text+'</p>';
            var loading = $('<p class="loading">'+s.loading_text+'</p>');

            if(s.username && typeof(s.username) == "string"){
                s.username = [s.username];
            }

            $(widget).unbind("tweet:load").bind("tweet:load", function(){
                if (s.loading_text) $(widget).empty().append(loading);

                $.ajax({
                    dataType: "json",
                    type: "post",
                    url: s.modpath || "/twitter/",
                    data: { request : build_api_request() },
                    success: function(data) {
                        if(data.message) {
                            console.log(data.message);
                        }

                        var response = data.response;
                        $(widget).empty().append(list);
                        if (s.intro_text) list.before(intro);
                        list.empty();

                        var tweets = $.map(response.statuses || response, extract_template_data);
                        tweets = $.grep(tweets, s.filter).sort(s.comparator).slice(0, s.count);
                        list.append($.map(tweets, function(o) { return "<li>" + t(s.template, o) + "</li>"; }).join('')).
                            children('li:first').addClass('tweet_first').end().
                            children('li:odd').addClass('tweet_even').end().
                            children('li:even').addClass('tweet_odd');

                        if (s.outro_text) list.after(outro);
                        $(widget).trigger("loaded").trigger((tweets.length === 0 ? "empty" : "full"));
                        if (s.refresh_interval) {
                            window.setTimeout(function() { $(widget).trigger("tweet:load"); }, 1000 * s.refresh_interval);
                        }
                    }
                });
            }).trigger("tweet:load");
        });
    };
}));
